Union Arena

That Time I Got Reincarnated as a Slime

UE20BT · Bandai · June 2026

That Time I Got Reincarnated as a Slime (set code UE20BT) is a Union Arena set published by Bandai, released June 2026. This set is listed for reference in the TCG Calendar release archive.

This set is archived here for reference. Its individual products aren’t listed on TCG Calendar.